scholarly journals Effect of Shielding Gas Volume Flow on the Consistency of Microstructure and Tensile Properties of 316L Manufactured by Selective Laser Melting

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 205
Author(s):  
Ruochen Ding ◽  
Jun Yao ◽  
Baorui Du ◽  
Kailun Li ◽  
Tao Li ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Selective Laser Melting ◽  
Mass Production ◽  
Strong Influence ◽  
Base Plate ◽  
Volume Flow ◽  
Shielding Gas ◽  
Laser Melting ◽  
Gas Volume ◽  
By Products

In recent years, selective laser melting (SLM) has been widely used in aerospace, automobile, biomedicine and other fields. However, there still remain many challenges to obtain consistent parts at the different positions on the base plate, which could be harmful to the industrial mass-production. In SLM process, the process by-products that flow with the shielding gas may influence the microstructure and tensile properties of the parts placed on different positions of the base plate. In this study, the velocity field of the shielding gas with different shielding gas volume flows was simulated. The tensile properties of the samples fabricated with different shielding gas volume flow were experimentally studied. The results show that the shielding gas volume flow has a strong influence on the sample consistency, and proper increase in shielding gas volume flows can be beneficial to consistency and tensile strength.

Influence of the shielding gas flow on the removal of process by-products in the selective laser melting process

2016 ◽  
Vol 10 ◽  
pp. 1-9 ◽  
Author(s):  
Alexander Ladewig ◽  
Georg Schlick ◽  
Maximilian Fisser ◽  
Volker Schulze ◽  
Uwe Glatzel
Keyword(s):  
Selective Laser Melting ◽  
Gas Flow ◽  
Melting Process ◽  
Shielding Gas ◽  
Laser Melting ◽  
Selective Laser Melting Process ◽  
By Products

scholarly journals Fabrication of Mesh Patterns Using a Selective Laser-Melting Process

2019 ◽  
Vol 9 (9) ◽  
pp. 1922 ◽  
Author(s):  
Tae Woo Hwang ◽  
Young Yun Woo ◽  
Sang Wook Han ◽  
Young Hoon Moon
Keyword(s):  
Selective Laser Melting ◽  
Laser Scanning ◽  
Dimensional Accuracy ◽  
Base Plate ◽  
Steel Powder ◽  
Melting Process ◽  
304 Stainless Steel ◽  
Process Conditions ◽  
Laser Melting ◽  
Metal Mesh

The selective laser-melting (SLM) process can be applied to the additive building of complex metal parts using melting metal powder with laser scanning. A metal mesh is a common type of metal screen consisting of parallel rows and intersecting columns. It is widely used in the agricultural, industrial, transportation, and machine protection sectors. This study investigated the fabrication of parts containing a mesh pattern from the SLM of AISI 304 stainless steel powder. The formation of a mesh pattern has a strong potential to increase the functionality and cost-effectiveness of the SLM process. To fabricate a single-layered thin mesh pattern, laser layering has been conducted on a copper base plate. The high thermal conductivity of copper allows heat to pass through it quickly, and prevents the adhesion of a thin laser-melted layer. The effects of the process conditions such as the laser scan speed and scanning path on the size and dimensional accuracy of the fabricated mesh patterns were characterized. As the analysis results indicate, a part with a mesh pattern was successfully obtained, and the application of the proposed method was shown to be feasible with a high degree of reliability.

Anisotropy of Microstructure and Tensile Properties of AlSi10Mg Formed by Selective Laser Melting

2018 ◽  
Vol 45 (7) ◽  
pp. 0702003 ◽  
Author(s):  
侯伟 Hou Wei ◽  
陈静 Chen Jing ◽  
储松林 Chu Songlin ◽  
王修专 Wang Xiuzhuan ◽  
杨志逸 Yang Zhiyi ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Selective Laser Melting ◽  
Laser Melting

scholarly journals Superior tensile properties of 1%C-CoCrFeMnNi high-entropy alloy additively manufactured by selective laser melting

2019 ◽  
Vol 8 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Jeong Min Park ◽  
Jungho Choe ◽  
Jung Gi Kim ◽  
Jae Wung Bae ◽  
Jongun Moon ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Selective Laser Melting ◽  
High Entropy Alloy ◽  
Laser Melting ◽  
High Entropy

Correlation Between Microstructure and Tensile Properties of STS 316L and Inconel 718 Fabricated by Selective Laser Melting (SLM)

2020 ◽  
Vol 20 (11) ◽  
pp. 6807-6814
Author(s):  
Jungsub Lee ◽  
Minshik Lee ◽  
Im Doo Jung ◽  
Jungho Choe ◽  
Ji-Hun Yu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
Tensile Elongation ◽  
Processing Condition ◽  
Processing Parameters ◽  
Fusion Pore ◽  
Laser Melting ◽  
Track Width

The correlation between microstructure and tensile properties of selective laser melting (SLM) processed STS 316L and Inconel 718 were investigated at various heights (top, middle and bottom) and planes (YZ, ZX and XY). Columnar grains and dendrites were formed by directional growth during solidification. The average melt pool width and depth, and scan track width were similar in both specimens due to fixed processing parameters. SLM Inconel 718 has moderate tensile strength (1165 MPa) and tensile elongation (11.5%), whereas SLM STS 316L has outstanding tensile strength (656 MPa) and tensile elongation (75%) compared to other SLM processed STS 316L. Fine columnar diameter (0.5 μm) and dense microstructures (porosity: 0.35%) in SLM STS 316L promoted the enhancement of tensile elongation by suitable processing condition. Fractographic analysis suggested that the lack of fusion pore with unmelted powder should be avoided to increase tensile properties by controlling processing parameters.

Sign in / Sign up

Export Citation Format

Share Document